0020244997_07 Installation and maintenance instructions
35
4.
Close the draining cocks.
5.
Refill the heating system with water.
6.
Check that the expansion relief valve of the heating
system is functioning correctly by turning the handle on
the valve.
7.
Check the pressure in the heating system and top up
with water if necessary.
8.
Close the filling valve and the cold water tap.
9.12
Filling the heating installation
1
1.
Flush the heating installation through.
2.
Undo the cap of the automatic air vent
(1)
by one to
two rotations and leave it open, as the product purges
itself via the automatic air vent even in continuous op-
eration.
3.
Select the check programme
P.06
.
◁
The prioritising diverter valve moves to the mid-
position, the pumps do not run and the product
does not switch to heating mode.
4.
Observe the information on treating heating water.
(
5.
Check all connections and the entire system for leaks.
Condition
: Applies to: Products with integrated domestic hot water genera-
tion
3
1
2
4
▶
Open all radiator valves (thermostatic valves) of the heat-
ing installation.
▶
Fit the double non-return valve
(1)
of the filling line to the
cold-water isolation valve and secure the valve with the
spring clip
(2)
.
▶
To fill, first open the isolation valve
(3)
.
▶
Open the isolation valve
(4)
so that the water flows into
the heating system. Fill the heating system.
▶
Purge the lowest radiator until water flows out of the pur-
ging valve without bubbles.
▶
Purge all other radiators until the entire heating system
has been filled with water.
▶
Close all purging valves.
▶
Monitor the rising filling pressure in the heating installa-
tion.
▶
Fill with water until the required filling pressure is
reached.
▶
After filling, close both isolation valves and disconnect
the filling device by removing the double non-return valve
from the cold-water isolation valve.
Note
Both isolation valves must be closed while the
heating system is operating and the filling line
must be removed from the double non-return
valve again.
▶
Check all connections and the entire system for leaks.
Condition
: Applies to: Products with heating mode only
▶
Connect the filling/draining cock in the heating installation
to a heating water supply, if possible with the cold water
tap, in accordance with the relevant standards.
▶
Open the heating water supply.
▶
Open all radiator valves (thermostatic valves) of the heat-
ing installation.
▶
If necessary, check that both service valves on the
product are open.
▶
Slowly open the filling/draining cock so that the water
flows into the heating system.
▶
Purge the lowest radiator until water flows out of the pur-
ging valve without bubbles.
▶
Purge all other radiators until the entire heating system
has been filled with water.
▶
Close all purging valves.
▶
Monitor the rising filling pressure in the heating installa-
tion.
▶
Fill with water until the required filling pressure is
reached.
▶
Close the filling/draining cock and the cold water tap.
▶
Check all connections and the entire system for leaks.
9.13
Purging the heating installation
1.
Select the check programme
P.00
.
◁
The product does not start up, the internal pump
operates intermittently and purges either the heat-
ing circuit or the hot water circuit.
◁
The display shows the filling pressure of the heat-
ing installation.
2.
Make sure that the filling pressure of the heating install-
ation does not fall below the minimum filling pressure.
